Vacuum Impregnation Adhesive Systems

        Internal Porosity Sealing
Features
Prevent cast metal leaks
Improved parts machinability
Improved surface quality
Superior chemical resistance
 
Approvals
 

Hernon Porosity Sealant (HPS) is the solution to leak proofing
        of parts. HPS offers improved machinability and surface
Hernon Tradeshows
June 8-12 World Congress on Powder Metallurgy & Particulate Materials
Washington, D.C.
Booth: 603
quality
        for painting and plating. The hardened resins exhibit superior
        chemical resistance and elevated temperature stability.
The 
microscopic voids in the parts where potential leaks occur
        are filled by the low viscosity resin and sealed permanently.
        
The parts leave the impregnating process without surface residue
        and can then be used in production. 
When used in preparation
        for plating materials, like acids, or painting prep solvents,
        that could later bleed out of the pores causing finishes to discolor,
        blister, pit or peel.
Typical Applications
Pneumatic tool castings
          
Automotive carburetors
          
Engine blocks
          
Water and fuel pumps
          
Plastic molds
          
Valves, manifolds
          
Railway, truck brake parts
          
Hydraulic pumps
          
Steering gear components
          
Compressor parts
          
Powdered metal gun parts
          
Regulators
Porosity problems cause castings, powder metal parts, plastics,
        ceramics and other porous substrates to leak through the body.
        Production management is challenged to solve this problem due
        to increased production demands, soaring scrap costs as well
        as quality control.
Inherently, powdered metal parts have high percentages of
        voids. After sintering and loss of the wax binders, impregnation
        improves the machinability of sintered parts.
HPS promotes consistent,
        rather than intermittent, tool contact on the filled surfaces.
        Less shock translates into greater tool life and better dimensional
        control on impregnated parts.
Hernon Porosity Sealant systems offer superior stability and
        predictability during the impregnation process. Comparison to
        "classic" sealing materials like sodium silicate show
        the clear performance superiority of HPS impregnation. Full and
        complete sealing, without limitations, is the norm.
Military Approvals
Hernon QPL Approval
Mil-STD-276A (description)
Mil-I-17563C (description)
PDF reader required to view
Industrial Approvals
Daimler Chrysler
MS-9543 Change Level G
CS-9003
CS-9800
Ford Motor Corporation
ESA-M4G210-A
ESE-M4G17-B
Delphi Steering Systems 
26081932
PDF reader required to view
NSF Approvals
HPS 990 - 
NSF International
Certified to ANSI/NSF Standard 61 for use in commercial and residential potable water systems not exceeding 82°C(180°F)
 
        
 
 
HPS
Comparison
Chart
HPS
Grades
990
991
1000
1100